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Title: Dynamic response of strongly correlated Fermi gases in the quantum virial expansion

Abstract

By developing a quantum virial expansion theory, we quantitatively calculate the dynamic density response function of a trapped strongly interacting Fermi gas at high temperatures near unitarity. A clear transition from atomic to molecular responses is identified in the spectra when crossing from the BCS to BEC regimes, in qualitative agreement with recent Bragg spectroscopy observations. Our virial expansion method provides a promising way to solve the challenging strong-coupling problems and is applicable to other dynamical properties of strongly correlated Fermi gases.

Authors:
 [1]; ;  [1]
  1. ARC Centre of Excellence for Quantum-Atom Optics, Centre for Atom Optics and Ultrafast Spectroscopy, Swinburne University of Technology, Melbourne 3122 (Australia)
Publication Date:
OSTI Identifier:
21408485
Resource Type:
Journal Article
Journal Name:
Physical Review. A
Additional Journal Information:
Journal Volume: 81; Journal Issue: 3; Other Information: DOI: 10.1103/PhysRevA.81.033630; (c) 2010 The American Physical Society; Journal ID: ISSN 1050-2947
Country of Publication:
United States
Language:
English
Subject:
74 ATOMIC AND MOLECULAR PHYSICS; DENSITY; FERMI GAS; RESPONSE FUNCTIONS; SPECTRA; SPECTROSCOPY; STRONG-COUPLING MODEL; TRAPPING; UNITARITY; FUNCTIONS; MATHEMATICAL MODELS; PARTICLE MODELS; PHYSICAL PROPERTIES

Citation Formats

Hui, Hu, Department of Physics, Renmin University of China, Beijing 100872, Xiaji, Liu, and Drummond, Peter D. Dynamic response of strongly correlated Fermi gases in the quantum virial expansion. United States: N. p., 2010. Web. doi:10.1103/PHYSREVA.81.033630.
Hui, Hu, Department of Physics, Renmin University of China, Beijing 100872, Xiaji, Liu, & Drummond, Peter D. Dynamic response of strongly correlated Fermi gases in the quantum virial expansion. United States. https://doi.org/10.1103/PHYSREVA.81.033630
Hui, Hu, Department of Physics, Renmin University of China, Beijing 100872, Xiaji, Liu, and Drummond, Peter D. Mon . "Dynamic response of strongly correlated Fermi gases in the quantum virial expansion". United States. https://doi.org/10.1103/PHYSREVA.81.033630.
@article{osti_21408485,
title = {Dynamic response of strongly correlated Fermi gases in the quantum virial expansion},
author = {Hui, Hu and Department of Physics, Renmin University of China, Beijing 100872 and Xiaji, Liu and Drummond, Peter D},
abstractNote = {By developing a quantum virial expansion theory, we quantitatively calculate the dynamic density response function of a trapped strongly interacting Fermi gas at high temperatures near unitarity. A clear transition from atomic to molecular responses is identified in the spectra when crossing from the BCS to BEC regimes, in qualitative agreement with recent Bragg spectroscopy observations. Our virial expansion method provides a promising way to solve the challenging strong-coupling problems and is applicable to other dynamical properties of strongly correlated Fermi gases.},
doi = {10.1103/PHYSREVA.81.033630},
url = {https://www.osti.gov/biblio/21408485}, journal = {Physical Review. A},
issn = {1050-2947},
number = 3,
volume = 81,
place = {United States},
year = {2010},
month = {3}
}